Docker: re-adding libsqlite3-0

This is a required dependency of the heptapod Debian package,
that was previously installed by the vim package, which is no
longer here, so we need to add it explicitely.

--HG--
branch : heptapod
4 jobs for !43 with topic/heptapod/gitlab-14.1 in 44 minutes and 48 seconds (queued for 1 second)
latest detached
Status Name Job ID Coverage
  Test
passed rspec #240025

00:01:41

 
  Package
passed pkg-ubuntu-focal #240026

00:38:46

 
  Docker
passed docker-testing #240027

00:04:21

 
  Functional
passed heptapod-tests-default